I'd like to set up a continuous delivery workflow for our new Drupal site. When someone pushes to our Git repo (typically) master branch, a build job on our CI server is triggered. This job will check ...

What are the things that should I investigate for making an estimate of the cost of deploying 1000 instances of Drupal, for example?
I was thinking in:
Database space
Database usage (in ops/second? ...

Suppose I have Drupal and CiviCRM installations to automate.
These, however, need particular configs for working together (some file edits and database configs)
Should I make a fixed version install ...

Assume you want to implement continuous-integration (= CI) and continuous-deployment (= CD) for building and maintaining websites using Drupal (let's assume for Drupal Version 7). Often times Jenkins ...